Could a failing catalytic converter o r DPF be causing high emissions o r poor fuel economy in my Land Rover?

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Could a failing catalytic converter o r DPF be causing high emissions o r poor fuel economy in my Land Rover?

My Land Rover has started to emit a sulfur/rotten egg smell, black smoke, o r feels sluggish with reduced fuel economy — especially in heavy Pakistani traffic conditions. Could this be a sign of a blocked catalytic converter o r a blocked Diesel Particulate Filter DPF? What are the signs to confirm this, and how does such an issue affect emissions performance and engine power?
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Talha Kyanii asked on 11 Dec 2025 13:22:09 pm

1 Answer

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Gari Master - on 11 Dec 2025 13:23:19 pm

Yes. Both the catalytic converter petrol engines and Diesel Particulate Filter DPF for diesel engines are crucial for controlling emissions:

Catalytic converter issues: A blocked o r degraded converter leads to black smoke, sulfur smell, poor acceleration, and increased fuel consumption.

DPF problems: In diesel Land Rovers, frequent short trips o r city traffic in Pakistan can cause DPF clogging, leading to warning lights, loss of power, and black exhaust smoke.

Diagnosis & Solution:

Listen for unusual backpressure o r check for trouble codes like P2002 o r P242F DPF issues.

Cleaning o r replacing the DPF/catalytic converter may be necessary.